Free — iPhone, Mac, Watch & Vision Pro

Actually remember
what you learn.

Feed in any article, paper, book, podcast, or course. AI generates flashcards, then tests whether you can explain each concept — not just recognize it.

Download for Mac

100% free with your own API key. No account required.

How It Works

From content to
deep understanding

The Feynman Technique says: if you can't explain it simply, you don't understand it. FeynmanLM automates this with AI.

Add any source

Paste a URL, drag a PDF, or drop a transcript. Works with articles, papers, books, podcasts, and courses.

AI generates flashcards

Studio extracts the key ideas and proposes flashcards. You review and approve before they enter your collection.

Explain in your own words

Type or speak your answer. Every question is rephrased by AI so you can't just memorize wording — you have to understand the concept.

AI scores & follows up

Claude or ChatGPT evaluates your explanation, highlights gaps, and asks follow-up questions until you hit 80% understanding.

Fully hands-free

Review entirely by voice. AI reads questions, listens, evaluates, and responds — no screen needed.

Spaced repetition

Cards resurface at scientifically optimal intervals. Active recall + spacing = 90%+ retention.

Source context

Every card links back to its source. Toggle original context during review for richer feedback.

Platforms

Native on every
Apple device

iPhone

Go hands-free on walks, commutes, or at the gym with ultra-low latency voice sessions.

iOS 17+

Mac

The full experience. Manage sources, explore the knowledge graph, and turn anything into flashcards.

macOS 14+

Apple Watch

Voice-first review from your wrist. Listen, speak, tap haptic buttons. No phone needed.

watchOS 10+

Also available on Apple Vision Pro (visionOS 2+)

Free to use. Powered by
Claude & ChatGPT.

FeynmanLM is completely free. Bring your own Claude or OpenAI API key — you only pay your API provider for what you use.